Mr. would be Doctorate, please do not end a sentence with a preposition i.e. "assumptions on."
You should be a bit more modest, and take time to inform yourself of the true rules of English. Churchill was, of course, mocking people like yourself. The rule about ending sentences with prepositions actually comes from Latin. May people got confused, thinking that the rules of high Latin should apply to English, too.Ending a sentence with a preposition is something up with which I will not put